CAROLYN D. GREENE PSY.D., P.C.
CAROLYN D. GREENE PSY.D., P.C. is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003595281, based in Katonah, NY. It is classified under Clinical Psychologist.
Getting there
Here is what surrounds this office in Katonah, based on OpenStreetMap data collected Oct 9, 2026. Parking is available about 244 ft away. The nearest transit stop is 435 ft away, served by Katonah station.
Getting here and what is nearby
Parking 21 ft ~1 min
Parking 76 ft ~1 min
Restaurant Jay Street Bistro 156 ft ~1 min
63 Katonah Avenue, Katonah 10536
Tu-Su 08:00-20:00
Parking 244 ft ~1 min
Transit Katonah station 435 ft ~2 min
Restaurant Blue Dolphin 611 ft ~3 min
175 Katonah Avenue, Katonah 10536
Restaurant La Familia Katonah | Pizza |Katonah, NY 0.25 mi ~5 min
278 Katonah Avenue, Katonah 10536
Mo-Su 10:00-22:00
Convenience Mobil 0.27 mi ~6 min
Gas station Mobil 0.27 mi ~6 min
Grocery DeCiccos Family Markets 0.50 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Clinical covers
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems. NUCC Health Care Provider Taxonomy, code 103TC0700X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003595281 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Jul 14, 2023 |
| Last updated | Jul 14, 2023 |
| Status | Active |
| Practice address |
15 PARKWAY Katonah, NY 10536 (917) 579-0943 |
| Mailing address |
26 LILY POND LN Katonah, NY 10536 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 5 | 9 | 5 | 2 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 9 | 1 | 2 | 7 |
Sum = 49 · next multiple of 10 = 50 · check digit = 1 · actual last digit = 1
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.